AeternoBlade II is a 2.5D side-scrolling action game centered on time manipulation, letting players slow, stop, or rewind moments to solve environmental puzzles and gain the upper hand in combat. The story continues the series with Freyja returning alongside additional playable heroes.

Varied stage design supports a mix of platforming and melee combat, with the time-based mechanics adding a layer of strategy beyond simple reflexes as players switch between characters and their abilities.